Hi,<br><br>Did you try <br><br>mapper->SetScalarRange()<br>mapper->ScalarVisibilityOn()<br><br>btw, I am also new so I can't guarantee it works :P<br><br>Janny<br><br><div><span class="gmail_quote">On 5/20/07, <b class="gmail_sendername">
YaoHaofeng</b> <<a href="mailto:hfyao1983@hotmail.com">hfyao1983@hotmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div style="text-align: left;">Hi, I am new to VTK and do not know how vtkLookupTable work, I have an array of points with scalar value 0-1500, and I want to map them to different colors, so I do:<br><br> vtkLookupTable *bwLut = vtkLookupTable::New();
<br> bwLut->SetTableRange(0, 1536);<br> bwLut->SetNumberOfColors(256);<br> bwLut->SetHueRange (0.6667, 0.0);<br> bwLut->SetSaturationRange (1.0, 1.0);<br> bwLut->SetValueRange (1.0, 1.0);<br>
bwLut->Build();<br><br> vtkPolyDataMapper *mapper = vtkPolyDataMapper::New();<br> mapper->SetLookupTable(bwLut);<br> mapper->SetInputConnection(clipper->GetOutputPort());<br> mapper->SetColorModeToMapScalars ();
<br> mapper->UseLookupTableScalarRangeOn();<br><br>But the entire image is blue everywhere, please help on correctly displaying colors with scalars.<br><br>thanks<br><br>hank <br></div><br><hr>中国十大热门旅游景点 <a href="http://search.msn.com/results.aspx?q=%E4%B8%AD%E5%9B%BD%E5%8D%81%E5%A4%A7%E9%A3%8E%E6%99%AF&mkt=zh-CN&form=QBRE" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
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